[1] Sediment flux from rivers to oceans is the fundamental driver of fluvio-deltaic morphodynamics and continental margin sedimentation, yet sediment transport across the river-to-marine boundary is poorly understood. Coastal rivers typically are affected by backwater, a zone of spatially decelerating flow that is transitional between normal flow upstream and the offshore river plume. Flow dece...

NOTATION A 'Effective area' in Boussinesq ventilation model, see eqn (24) ,4 'Effective area' in non-Boussinesq ventilation model, see eqn (28) A I Area of floor covered by base of fire a Area of vent B Plume buoyancy flux b Plume radius c r Specific heat capacity at constant pressure D Diameter of fire source d Upper-layer depth F Scaled density deficit, a conserved quantity with units of buoy...

The main objective of this study is to explain the experimental observations. To simulate material ablation, plume formation and its evolution, we developed a combined molecular dynamics (MD) and direct simulation Monte Carlo (DSMC) computational study of laser ablation plume evolution. The first process of the material ablation is described by the MD method. The expansion of the ejected plume ...

We use ozone and carbon monoxide measurements from the Tropospheric Emission Spectrometer (TES), model estimates of Ozone, CO, and ozone pre-cursors from the Real-time Air Quality Modeling System (RAQMS), and data from the NASA DC8 aircraft to characterize the source and dynamical evolution of ozone and CO in Asian wildfire plumes during the spring ARCTAS campaign 2008. On the 19 April, NASA DC...

There are increasing evidences that probability distributions and associated statistical moments of a variety hydrogeological soil science variables their spatial increments display distinctive scale-dependent features not captured by typical Gaussian model. A Generalized Sub-Gaussian (GSG) model is able to capture key aspects this pattern. We present the results suite computational analyses se...

The interaction of a jet from a 3000-N-class thruster positioned on the side of a small rocket, with the rareŽ ed atmosphere at 100 and 80 km, is studied numerically. The direct simulation Monte Carlo method was applied to model the three-dimensional jet-atmosphere interaction. Chemical reactions between freestream and plume species were included in the simulations. A two-stage numerical strate...

A phenomenological model of air entrainment into combusting regions of axisymmetric fire plumes is developed and compared with some existing experimental entrainment data. The model considers engulfment of ambient air into a fire plume due to the action of the toroidal vortices that are formed periodically close to the source of an axisymmetric fire. It is shown that the diffusive entrainment r...

We model the plume ‘splashback’ phase of the Shoemaker-Levy 9 (SL9) collisions with Jupiter. We modified the ZEUS-3D hydrodynamic code to include radiative transport in the gray approximation, and present validation tests. After initializing with a model Jovian atmosphere, we couple mass and momentum fluxes of SL9 plume material, as calculated by the ballistic Monte-Carlo plume model of Paper I...

Coastal rivers often generate buoyant plumes at their mouth following high inflow rate events. This coastal water, especially in flooding season, collects freshwater runoff with a large number of sediments, which significantly affects the environment of the continent shelf. In the present study, the dynamics of a plume on a Southern Hemisphere coast has been studied using a 3D hydrodynamic mode...

The detection of an odor source location has been enhanced by using multiple plume-tracing mobile robots. So far, many researchers focus on locating a single source in varied environments. The present study is concerned with the problem of multiple chemical sources localization using multi-robot system. In this study, multiple groups of robots were used and coordinated by a multi-robot cooperat...